Semiclassical techniques are introduced within the hyperspherical coordinate approach, which allows the reduction of many-body problems to the multichannel close coupling formalism in terms of a single (hyper) radial variable. The theory, when applied to collinear chemical reactions, leads to the ...
acid and the Haber process for ammonia. The later required a major technological breakthrough that of being able to carry out chemical reactions under conditions of very high pressure for the first time. The experience gained with this was to stand Germany in good stead, particularly with the ...
英语翻译2.11.Physico-chemical reactionsThe reaction with aluminium chloride was used to verify the existence of vicinal hydroxyl-groups.The absorption spectra of a methanolic solution of the pigment was registered before and after addition of 5% methanol
A small quantity of aspirin (two five-grain tablets) relieves pain and inflammation(炎症). It also reduces fever by interfering with some of the body’s reactions. 1.The passage is written to. A.suggests us using more aspirin B.reminds us of the side effects of aspirin ...
Hydrogen sulfide (H2S) is an important endogenous gasotransmitter, but the bioorthogonal H2S donors are limited. Here, the authors design and synthesize sydnthiones, and investigate their bioorthogonal reactions with strained alkynes for mitochondria-targeted H2S release. ...
Types of Chemical Reactions in Biology Biochemical reactions take place within an organism's body as well as within the cells. Some reactions involve the building of molecules such thatmonomersare used to make polymers. Reactions involving the building bigger of molecules from smaller ones are referr...
Most of the chemical reactions related to biomass conversion involve a three-phase process: gas, liquid, and solid catalysts are present. Internal and external mass transfer limitations in porous catalyst layers play a central role in three-phase processes. The governing phenomena are well known sin...
Figure 5.2.2 SPDP derivatization reactions. SPDP (S1531) reacts with an amine-containing biomolecule at pH 7 to 9, yielding a pyridyldithiopropionyl mixed disulfide. The mixed disulfide can then be reacted with a reducing agent such as DTT (D1532) ...
The main causes ofchemical toxicityare side reactions of drug molecules with DNA or proteins, as well as interference with enzymatic systems. There are two databases containing factual toxicological information. One is the RTECS (Registry of Toxic Effects of Chemical Substances), with data on 100 ...
They should be distinguished from antibiotics, which destroy bacteria within the body, and from disinfectants, which destroy microorganisms on surfaces of non-living objects. antistatic agent Antistatik-Zusatz, der (chem.) Antistatic agents such as glycerine-monostearate (GMS) increase the electrostatic...